AMETEK DLM 600W Series - Manual (Page 76)

DLM 600W Series
M362161-01 K 5-2
SYMPTOM CHECK ACTION
No output; all displays and
indicators are blank Is the utility power present? Connect power
Is the AC input power cord
defective? Check continuity; replace
if necessary
Unit starts but there is no
output; OVP and FAULT
indicators are off Is the AC input voltage within
the allowed range? Connect to appropriate
voltage source
Output is present
momentarily but quickly
shuts off; OVP and FAULT
indicators are off Does the voltage of the AC
source sag when load is
applied? Ensure that the AC
source has low output
impedance and can
supply adequate current
No output; displays and
indicators are functional Is the OVP indicator on? See Section 3.5, OVP
Operation
Is the EXT–OFF indicator on? See Section 4.5,
EXTERNAL–OFF Control
Is the REM indicator on? See Section 4.4, Remote
Programming
Is the FAULT indicator on? Determine if an overtem-
perature condition exists;
allow unit to cool and
then toggle the OUTPUT
switch off and back on
If an overtemperature is
not present, an internal
fault exists
Output turns off as soon as
POWER switch is turned on;
OVP indicator turns on Is remote sense selected,
but sense leads are not
connected? See Section 2.10, Load
Voltage Sensing
Output voltage will not adjust Is the unit in current–mode? See Section 3.4, Mode of
Operation Setup
Output current will not adjust Is the unit in voltage–mode? See Section 3.4, Mode of
Operation Setup
Front panel controls are
nonfunctional Is unit in remote control with
LOCAL–LOCKOUT enabled? See Section 3.6.4,
LOCAL/REMOTE Switch
Front panel controls are
nonfunctional; voltage
display is off Is slave mode selected? See Section 2.12, Parallel
Operation
Large AC component
present in output Is the power converter
unstable? See Section 2.9.3, Noise
and Impedance Effects
Table 5–1. Troubleshooting Guide